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  • Flex Just Paid $4.4 Billion for a Power Converter.

Flex Just Paid $4.4 Billion for a Power Converter.

It makes the gear between your meter and the GPU. Each unit is custom. Each one is on backorder.

The Capital Current
The Capital Current

Sep 9, 2026

• THE GRID

The $4.4 Billion Link in the Chain

A few years ago, almost nobody outside the industry had heard of EPC Power.

Last week, Flex paid $4.4 billion for it.

EPC makes one thing. It turns raw grid power into clean, steady current for AI chips.

Digital rectifiers. 800-volt systems built for the densest AI racks on earth, with solid-state transformers on the roadmap.

The company was founded in 2010. Goldman Sachs Alternatives and Cleanhill Partners backed it.

In recent years, EPC grew its U.S. factory space nearly tenfold. It went from a niche player to a critical supplier for hyperscale AI builds.

❝

"We expanded our domestic manufacturing footprint nearly tenfold, strengthening America's industrial base and reinforcing the critical role of US innovation in powering the future economy."

— Jim Fusaro, CEO, EPC Power

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Flex, a Singapore contract maker, will fold EPC into its power unit. Then spin the whole thing out as a public company.

The play has a name: "grid-to-chip." One vendor from the substation to the server rack.

Power conversion. Cooling. Rack design. All under one roof.

Deal Value
$4.4B
Company Age
16 Years
Factory Growth
~10×
Architecture
800V DC

I've spent months tracking the power bottleneck. Turbine orders. Transformer backlogs. Transmission queues that stretch a decade.

This deal reveals a new front in the same war.

Getting power to the data center is half the job. Inside, it must be cleaned, shaped, and fed to each rack at exact specs.

That gear is scarce. And it costs more every quarter.

A one-gigawatt campus needs thousands of these units. Each one custom. Each one on backorder.

Two years ago, nobody paid billions for power gear firms. The money chased chip stocks and cloud names. Not anymore.

In March, Google paid $4.75 billion for Intersect Power. Now Flex pays $4.4 billion for EPC.

Two deals. Six months. Over $9 billion. Both aimed at the same gap in the chain.

EPC's price tag is larger than most mid-size electric utilities. For a company that builds the link between the meter and the motherboard.

The AI energy trade began with power plants and turbines. The money has now reached the last mile — every piece of copper and silicon between the grid and the GPU.

This is where I'm watching next. Not just who builds the plants. But who builds the gear inside the walls.

A sixteen-year-old power converter company just sold for $4.4 billion. The bottleneck has moved inside the building.

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• WIRED IN

Signals From the Build

  • HD Hyundai Heavy Industries landed a $674 million contract to ship 1,000 megawatts of gas engines to a U.S. data center. The buyer is Corban Energy Group, a New Jersey-based power and LNG firm. These are modular 9.6-megawatt HiMSEN engines that run on natural gas and skip the grid entirely. It's the biggest power engine order in HD Hyundai's history.

  • The off-grid trend needs cash, and MasTec just raised it. The grid contractor priced $650 million in 10-year bonds at 5.85% in August. The cash will go toward debt and operations. You don't raise $650 million unless you see years of work ahead.

  • Across the Atlantic, Rolls-Royce says data center energy orders surged more than 50% in the first half of 2026. CFO Helen McCabe told CNBC that grid strain is pushing operators toward backup and on-site power solutions. When a British jet-engine company calls out data centers as a growth driver on an earnings call, the trade is everywhere.

  • Back in Washington, the EIA's latest outlook holds its Texas demand cut. The agency slashed its 2027 Texas electricity growth forecast from 14% to 6% after Governor Abbott's August audit froze ERCOT's data center queue. About 90% of ERCOT's 474-gigawatt queue is data centers. Even the federal forecasters are pricing in political risk now.

South Korea. Britain. Florida. Washington. Four signals, four places — all saying the same thing: power is the trade.

• VOLTAGE

The $13 Billion Garage Battery

Last month, a startup in Austin raised $1 billion. Not for a power plant. Not for a data center. For a battery that mounts on a garage wall.

Base Power closed its Series D at a $13 billion valuation. That's their second billion-dollar raise in about ten months.

$13B Valuation
Base Power — Series D, August 2026

The product is the Base Core. A 39.2 kilowatt-hour home battery made in Austin. It keeps a house lit for up to 36 hours in a blackout.

Base sells it as a subscription. No big upfront cost.

Right now, Base has about 500 megawatt-hours of batteries in the field. All in Texas and Illinois. That's small. But the model is what counts.

Each battery is grid-connected. When demand spikes, Base pushes stored power back to the grid. Thousands of homes, working together, act like a small power plant.

No land permits. No transmission lines. No five-year queue.

Texas needs this more than any state. ERCOT's queue is frozen. Hundreds of data center projects are stalled. The big supply-side fixes are years away.

But behind the meter, there's room to grow right now.

Everyone is watching the big plays — billion-dollar gas plants, nuclear deals, turbine orders. I think the quiet play may be just as big.

Base's second billion-dollar raise in less than a year tells me the smart money agrees.

The most important power plant of 2026 might not be a plant at all. It might be a box in your neighbor's garage.

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